TASK DEFINITION: In this task, you are given a sentence and question which can be answered using the sentence. Your task is to answer the question using the information from the sentence. The answer to the question is unique and it is a continuous text span from the sentence.
PROBLEM: Sentence: Until the early 1980s , broadcasting in South Africa was state controlled - the sole broadcaster being the SABC . 
 Question: when was something controlled  until?

SOLUTION: the early 1980s

PROBLEM: Sentence: An `` optical image stabilizer '' , often abbreviated OIS , IS , or OS , is a mechanism used in a still camera or video camera that stabilizes the recorded image by varying the optical path to the sensor . 
 Question: what is something used  in?

SOLUTION: a still camera or video camera ### a still camera ### video camera

PROBLEM: Sentence: Then , built by the LNWR , the branch line to Ashbourne was opened in 1899 . 
 Question: when was something opened?

SOLUTION:
in 1899

